On 31/12/2020 12:19, Konrad Hinsen wrote:
It's been a while since I have encountered mysterious behavior in Pharo, but today it happened. I set up a dictionary with classes as keys, and got "Key not found" errors for keys that were definitely in my dictionary. A quick debugging session showed the underlying issue: I had two references to a class which look the same when inspected, but turn out to be not identical (==) and thus not equal (=). How can this happen?
Update, after a few more debugging sessions: my dictionary is the result of a deepCopy operation, meaning the class has been copied. And the copy of a class is indeed a distinct but otherwise indistinguishable class. 'Object copy = Object' is 'false'.
Konrad.
